| Year | January 1943 |
| Vehicle Type | [@type] |
| Origin & Designer | [@designer] |
| Numbers Produced | 535 |
| Crew | 5 (Commander, Gunner, Two Loaders & Driver) |
| Main Armament | 2 x .50 cal M2HB Heavy Machine Guns |
| Main Armament | [@sponson_traverse] |
| Elevation | -10° to +90° |
| Turret Traverse | 360° (Powered 60°/Sec) |
| Gun Traverse | [@gun_traverse] |
| Gun Mount | [@gun_mounts] |
| Maximum Range | [@maximum_range] |
| Armour Penetration | [@armour_penetration] |
| Gun Sight | 6.50m |
| Secondary Armament | [@secondary_armament] |
| Smoke Discharger | [@smoke_discharger] |
| Ammunition Carried | 5000 x .50 cal |
| Height | 2.30m |
| Width | 1.96m |
| Length | 6.50m |
| Combat Weight | 8.390 kg |
| Ground Clearance | 0.28m |
| Fording Depth | 0.81m |
| Trench Crossing | 0.76m |
| Obstacle Clearance | 0.30m |
| Climbing Ability | 31° |
| Radio | [@radio] |
| Armour | Upper Hull Front: 13mm. Lower Hull Front: 6.4mm. Upper Hull Sides: 6.4mm. Lower Hull Sides: 6.4mm. Hull Rear: 6.4mm. Hull Top: Open. Hull Bottom: 6.4mm. |
| Engine | White 160AX 147 hp (Petrol) |
| Transmission | 4 Forward & 1 Reverse |
| Maximum Road Range | 198 miles (320 km) |
| Maximum Cross Country Range | 175 miles (282 km) |
| Maximum Water Range | [@maximum_water_range] |
| Maximum Road Speed | 45 mph (72 kph) |
| Maximum Cross Country Speed | 9 mph (15 kph) |
| Maximum Water Speed | [@maximum_water_speed] |
| Variants | [@variants] |
| Notes | The US army had always requested a mobile anti-aircraft gun to accompany their armoured forces and this resulted in the M13. The M13 was the first of a long line of MGMCs and was based on the M3 chassis. It mounted twin .50 cal M2HB Heavy Machine Guns on a M33 Maxson mount. Crew; Commander, Gunner, Two Loaders and Driver. It served in Italy during the Anzio landings before being replaced by the M16. |